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Preparation method for forging and rolling lining plate with longitudinal streamline

A liner and longitudinal technology, which is applied in the field of preparation of mill wear-resistant liners, can solve the problems of rolling liners that cannot be mass-produced, unsatisfactory strength and toughness, and difficult to be accepted by the market, so as to improve market competitiveness , The effect of increasing the yield and enriching the corner

Active Publication Date: 2020-11-03
紫荆浆体管道工程股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. Improve the strength and scratch resistance, but it is not resistant to impact wear; it is easy to break;
[0010] 2. To improve the toughness, part of the strength must be sacrificed. The technical difficulty lies in the unsatisfactory combination of strength and toughness.
[0011] 3. The wear-resistant lining is a low value-added product, and the price is too high and the market is difficult to accept
Free forging still has the following technical problems: the riser accounts for about 17% of the entire steel ingot, the burning loss per fire is about 2%, the cutting head accounts for 5-12%, and the average yield of conventional forgings is only about 60-80%
The liner is a low-end product. According to the price of forged products, it is difficult for the market to accept it.
Even though the liner is of relatively high quality, it is not ideal
[0015] Rolled linings, due to the different shapes of linings, too thick thickness, too many models, and less demand for products, so rolled linings cannot be mass-produced

Method used

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  • Preparation method for forging and rolling lining plate with longitudinal streamline
  • Preparation method for forging and rolling lining plate with longitudinal streamline
  • Preparation method for forging and rolling lining plate with longitudinal streamline

Examples

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preparation example Construction

[0057] see Figure 1 to Figure 7 . This embodiment describes the preparation method of the forged rolling liner with longitudinal streamlines, the wear-resistant liner of the mill prepared by this method, and the preparation device of the wear-resistant liner of the mill. The preparation method of the forged liner with longitudinal streamlines includes the step of selecting the alloy elements of the corrosion-resistant steel, the step of smelting / rolling / forging, the step of heat treatment and cooling, the step of tempering, and the step of smelting / rolling / forging is to pass the cast billet through Smelted, rolled and / or forged into liner type. The corrosion resistant steel alloying elements are all known alloying element formulations published before the date of this application. And, this embodiment is to describe the process in detail, all of which are existing processes, such as heat treatment process and quenching process. The purpose of the present invention is to im...

Embodiment 2

[0072] In this embodiment, a 10.37-meter semi-autogenous mill forging liner is taken as an example, and a 3150-ton forging press is used for forming.

[0073] The alloy steel is smelted and refined to make a 9-ton cast billet.

[0074] The forging machine uses a conventional forging machine parallel forging seat to forge the continuous casting billet into a round forging billet with a diameter of 500mm by the process of two piers and two draws, and the round forging billet is forged into an oval forging billet.

[0075] Replace the parallel forging seat of the forging press, that is, the upper flat template and the lower flat template, with the forging seat of the preforming die, that is, the first forming die, put one long axis end of the oval forging blank into the forging seat of the preforming die for forging, and first carry out lifting of the lifting surface Pre-forming, and then forging and pressing while closing the edges on both sides, and then forming the mounting su...

Embodiment 3

[0081] In this embodiment, a 10.37-meter semi-autogenous mill forging liner is taken as an example, and a 15,000-ton forging press is used for forming.

[0082] The alloy steel is smelted and refined to make a continuous casting billet, rolled or forged into a square forging billet with a side length of 500mm, and the corners of the square billet are chamfered.

[0083] Replace the parallel forging seat of the forging press, that is, the upper flat template and the lower flat template, with the forging seat of the precision forming die, that is, the second program mold, and put the forging billet with square chamfers diagonally into the forging seat of the preformed mold for forging, first about 0.4 meters in width The narrow upper mold with a circular arc surface with waves or suspended surfaces is gradually extended back and forth to form, ensuring that the lifting surface and the installation surface are all filled in place and formed.

[0084] Change to the required size o...

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Abstract

The invention discloses a preparation method for a forging and rolling lining plate with a longitudinal streamline. The preparation method comprises the following steps that a casting blank is upset and drawn out to obtain a forging blank; the forging blank is put into a first forming mold, and is forged, pressed and formed to obtain a primary forming lining plate with longitudinal flow lines; theprimary forming lining plate is put into a second forming mold, and is forged, pressed and formed to obtain a fine forming lining plate; the fine forming lining plate is cut, formed and punched according to the required length of the lining plate; and finally, the mechanical property of the required lining plate is quenched and tempered. The preparation method overcomes the technical defect thatin the prior art, the free forging machining amount is large, and die-forging forming four corners are not fully filled, and the lining plate with the longitudinal flow lines is resistant to high impact and not prone to breakage.

Description

technical field [0001] The invention belongs to the field of lining plate manufacturing, and relates to a preparation method of a wear-resistant lining plate of a grinding mill. The lining plate has longitudinal streamlines. Background technique [0002] There are dozens of models of common semi-autogenous mills, autogenous mills, ball mills, etc., with a diameter of 2 to 15 meters and a length of 3 to 15 meters. Every 20 to 70 liners are assembled into a mill cylinder. The diameter and length of each semi-autogenous mill cylinder are different, and each type of mill has a different size and shape of the liner, but each type of cylinder liner has a mounting surface and a lifting surface, and the mounting surface is round. curved surface. Usually, the length of each liner is 0.5-2 meters, the thickness is 0.1-0.4 meters, and the width is 0.2-1 meters. [0003] The liner is used for crushing ore, and the liner is required to be resistant to high impact and scratches. Howeve...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21J5/02B21J13/02B02C17/22
CPCB21J5/002B21J5/02B21J13/02B02C17/22Y02W30/50
Inventor 刘鑫席建杨春娥
Owner 紫荆浆体管道工程股份公司
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